Brilliant scientist Jan Benes (Jean Del Val) develops a way to shrink humans and other objects for brief periods of time. He, who is working in Communist Russia, is transported by the C.I.A. to America, but is attacked en route. In order to save him, who has developed a blood clot in his brain, a team of Americans in a nuclear submarine is shrunk and injected into his body. They have sixty minutes to fix the clot and get out before the miniaturization wears off.—Jwelch5742